While government scientists raised Alert level 2 for Mayon Volcano in Albay Province, Bulusan Volcano in Sorsogon is being monitored closely after registering increase in activity.
DOST PHIVOLCS said a total of twenty-nine (29) volcanic earthquakes were recorded since 5AM of 6 October 2022 by the Bulusan Volcano Network or BVN.
Ground deformation data from continuous GPS measurements and radial tilt indicate a short-term inflation of the general southern edifice of Bulusan Volcano since April 2022.
Furthermore, 279 tonnes per day of sulfur dioxide (SO2) emission was measured last 29 September 2022. And, weak to moderate emission of white steam-laden plumes could be observed at the crater, while very weak emission of the white-steam laden plumes could be observed at northwest vents.
The increased seismic activity and short-term ground deformation are likely caused by shallow hydrothermal processes beneath the edifice.
Alert Level 0 (Normal) is maintained over Bulusan Volcano but is subject to change should current activity persist.
Since hydrothermal processes are underway beneath the volcano, there are increased chances of steam-driven or phreatic eruptions from its active vents.